Handling Systems Exposed to Extreme Temperatures?

NeoMagick asks: "I live in a rural town in the Pacific Northwest, and I'll soon be picking up a Shuttle system which will get mounted in the trunk of my car, and patched into probably an Alpine or Pyle in-dash LCD panel. This last week temperatures have gotten up to 105degF, and have been known to get to -10degF in the winters. I'm wondering if any /.ers have had issues with computers in cars in such extreme temperatures (overheating? freezing?), and if so what they did to solve such problems."